Your Total Savings ₹3819 What are pollen grains?
Pollen grains are male gametophytes of seed plants. They are microscopic structures that vary in size. They are composed of intine (inner layer), exine (outer layer) and an inner cytoplasm. The cytoplasm of mature pollen grains has two cells, namely – the generative and vegetative cells.
What is an aperture?
It is a soft and thin area on the walls of pollen grains. This soft aperture is vital for the pollen tubes to reach outside. These apertures can either be as pores or colpi (fissures)
What is a colpus?
An elongated furrow or aperture in the pollen structure is called a sulcus or colpus. If the aperture is more circular, it is termed as pores. Pores, sulcus and colpus are the main identification features in pollen grains.